Subtitled Land of Giants, this first of three wildlife films that together paint a natural-history portrait of North America focuses on the Pacific coast of the north west, home to giant animals and trees.
There's the giant Pacific salamander, the banana slug that weighs in at a quarter of a pound and the half-ton Roosevelt elk, living among the giant conifers of the oldest evergreen forests in the world.
Within this temperate rainforest, fogbound in summer, snowbound in winter, the salmon is hunted by bears and whales, turkey vultures hunt for carrion, flying squirrels feast on truffles and the most primitive frog in the world makes its home.
All too predictably, though, this unique environment is under threat - from the logging industry and the fires that are set to clear the debris once the trees have been felled.

(Apologies to readers hoping to see Wildlife on One: Earwig in this slot. The schedule was changed after Nature, page 10, went to press)